// Initialize popup as usual
$('.image-link').magnificPopup({

   
    type: 'image',
    mainClass: 'mfp-with-zoom', // this class is for CSS animation below

    zoom: {
        enabled: true, // By default it's false, so don't forget to enable it

        duration: 300, // duration of the effect, in milliseconds
        easing: 'ease-in-out', // CSS transition easing function 

        // The "opener" function should return the element from which popup will be zoomed in
        // and to which popup will be scaled down
        // By defailt it looks for an image tag:
        opener: function(openerElement) {
            // openerElement is the element on which popup was initialized, in this case its <a> tag
            // you don't need to add "opener" option if this code matches your needs, it's defailt one.
            return openerElement.is('img') ? openerElement : openerElement.find('img');
        }

    },
    image: {
        // options for image content type
        titleSrc: 'title'
    },
    gallery: {
        // options for gallery
        enabled: true
    },


}); // JavaScript Document